I have a Linux socket server program. I need to run the commands sent by the client and return the output to client. Is there a quicker way?
I tried with
ptr=popen(command, "r"); and then
fgets(buf, size,ptr);
write buf to socket
fgets hangs for me.
Now, I would like to know if I can... (3 Replies)
How can I grep exactly a string that has .,/ characters using grep?
Example: I want to grep ONLY string1 and not string1.more or string1.more.evenmore
#lsauth ALL|grep 'string1'
All output:
string1 <--- This is the only I want.
string1.more
string1.evenmore.
more.string1... (4 Replies)
This has been bothering me for 3 days.
$> hostname
cepsun64amd
And I just want "cepsun",
I would normally do h=`hostname`; ${h%%64*}
But I am looking for a one-liner just for my own knowledge, because if there is a way to do this, I should know it by now.
Anyway, so is this... (2 Replies)
Hi All
I am trying to run a script in linux wherein i have a command like this
grep ^prmAttunityUser= djpHewr2XFMAttunitySetup_ae1_tmp
djpHewr2XFMAttunitySetup_ae1_tmp is a temporary file in which the user value is stored but this command in the script returns me balnk value whereas it has a... (4 Replies)
Hi All,
I am trying to list the various dates for which the file is available in a directory using the command below, (& subsequently pass the command output to a loop)
Command :
ls dir|grep 'filename'|cut -d '_' -f1|cut -c1-8|tr '\n' ','
However, it is giving me an extra comma... (6 Replies)
Hi Experts,
I am very much new to linux scripting, I am currently working on reducing my manual work and hence writing a script to automate few task.
I am running below command to snmpwalk the router..
snmpwalk -v 3 -u WANDL_SU -a MD5 -A vfipmpls -x DES -X VfIpMpLs -l authPriv... (19 Replies)
I am using an awk command to extract a particular portion of a string. Below is the command and its output on a Linux system:
oracle@host1:/tmp (/home/oracle)
$uname -a
Linux host1 2.6.32-279.39.1.el6.x86_64 #1 SMP Fri Nov 15 05:38:26 EST 2013 x86_64 x86_64 x86_64 GNU/Linux
... (7 Replies)
I have a file example.txt as follows :SomeTextGoesHere
$$TODAY_DT=20140818
$$TODAY_DT=20140818
$$TODAY_DT=20140818I need to automatically update the date (20140818) in the above file, by getting the new date as argument, using a shell script.
(It would even be better if I could pass... (5 Replies)
I have two questions on Linux's free command. Below, I have provided output from my home laptop (fedora 26 ) which has 16GB Physical RAM and a production server (RHEL 7.4) which has 24GB RAM.
Question1. What exactly does the buffer/cache column say in free command's output ? buffer/cache is... (9 Replies)
Discussion started by: omega3
9 Replies
LEARN ABOUT DEBIAN
gsl-histogram
GSL-HISTOGRAM(1) General Commands Manual GSL-HISTOGRAM(1)NAME
gsl-histogram - compute histogram of data on stdin
SYNOPSYS
gsl-histogram xmin xmax [n]
DESCRIPTION
gsl-histogram is a demonstration program for the GNU Scientific Library. It takes three arguments, specifying the upper and lower bounds
of the histogram and the number of bins. It then reads numbers from `stdin', one line at a time, and adds them to the histogram. When
there is no more data to read it prints out the accumulated histogram using gsl_histogram_fprintf. If n is unspecified then bins of inte-
ger width are used.
EXAMPLE
Here is an example. We generate 10000 random samples from a Cauchy distribution with a width of 30 and histogram them over the range -100
to 100, using 200 bins.
gsl-randist 0 10000 cauchy 30 | gsl-histogram -100 100 200 > histogram.dat
A plot of the resulting histogram will show the familiar shape of the Cauchy distribution with fluctuations caused by the finite sample
size.
awk '{print $1, $3 ; print $2, $3}' histogram.dat | graph -T X
SEE ALSO gsl(3), gsl-randist(1).
AUTHOR
gsl-histogram was written by Brian Gough. Copyright 1996-2000; for copying conditions see the GNU General Public Licence.
This manual page was added by the Dirk Eddelbuettel <edd@debian.org>, the Debian GNU/Linux maintainer for GSL.
GNU GSL-HISTOGRAM(1)